Add files via upload

Author: nmirabal

SourceAnalysis/2.UnbinnedLikelihood/likelihood_tutorial.ipynb

@@ -874,7 +874,7 @@
     "\n",
     "If your region includes any extended sources, you will need to add one or more extended sources to your XML model.\n",
     "\n",
-    "Download the extended source templates from the [LAT Catalog](https://fermi.gsfc.nasa.gov/ssc/data/access/lat/14yr_catalog/) page (look for \"Extended Source template archive\"). Extract the archive in the directory of your choice and note the path to the template files, which have names like `W44.fits` and `VelaX.fits`. You will need to modify your XML model so that the path to the template file is correct.\n",
+    "Download the extended source templates from the latest [LAT Catalog](https://fermi.gsfc.nasa.gov/ssc/data/access/lat/fl16y/) page (look for \"Extended Source template archive\"). Extract the archive in the directory of your choice and note the path to the template files, which have names like `W44.fits` and `VelaX.fits`. You will need to modify your XML model so that the path to the template file is correct.\n",
     "\n",
     "In addition, you will need to add the modifier `map_based_integral='true'` to the `<spatialModel>` atttribute. This modifier tells [gtlike](https://raw.githubusercontent.com/fermi-lat/fermitools-fhelp/master/fhelp_files/gtlike.txt) to use the proper integration method when evaluating the extended source.\n",
     "\n",